Suggest middle names for Sibyl/Sybil please :)

We already have Edie and Isaac and I have fallen in love with Sibyl (and I am preferring this spelling as of now) as a potential sister. Do you think the name matches with siblings or at least isn't too different stylistically? What middle name would sound good with Sibyl? I haven't come up with a combo I love yet... Siblings middles are Rose and Edward and I don't want anything ending in y/ie sound... suggestions and thoughts on potential sibset Edie, Isaac and Sibyl? Thanks in advance!

@ Albertamomabear - thanks for that suggestion, never thought about that combo though I am unsure if I like the double L-ending names together... Maybe SibylJane?
@fairchild - thank you. I have Catherine, Elizabeth and Frances jotted down already. Elizabeth is a family name on both sides though I'm not sure about the flow. I am really liking SybilFrances and SybilVictoria is a very pretty combo!